JPS6027298B2 - tooth cutting device - Google Patents
tooth cutting deviceInfo
- Publication number
- JPS6027298B2 JPS6027298B2 JP56132515A JP13251581A JPS6027298B2 JP S6027298 B2 JPS6027298 B2 JP S6027298B2 JP 56132515 A JP56132515 A JP 56132515A JP 13251581 A JP13251581 A JP 13251581A JP S6027298 B2 JPS6027298 B2 JP S6027298B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- cutting
- vibration
- frequency
- pain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
- B23Q11/0039—Arrangements for preventing or isolating vibrations in parts of the machine by changing the natural frequency of the system or by continuously changing the frequency of the force which causes the vibration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
- A61C1/07—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with vibratory drive, e.g. ultrasonic
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Turning (AREA)
Description
【発明の詳細な説明】
歯牙切削治療時における疹痛や不快感，恐怖感を少しで
も和らげることは誰しもが期待しているところである。[Detailed Description of the Invention] Everyone is looking forward to alleviating the pain, discomfort, and fear experienced during tooth cutting treatment.
切削工具によって削るという力学的治療を行っているの
であるから、わずかでもその切削力を軽減し、切削時の
歯牙の動的な変動をなくして神経への動的刺戟の要因を
少〈することがその１つの方法として考えられる。疹痛
を軽減させる方法の順序として、１）歯牙の固定、２）
切削力の軽減、３）麻酔効果の利用が考えられる。すな
わち、切削時の切削力を軽減し、歯牙の動的挙動をなく
し、止むを得ない場合には麻酔注射あるし「は笑気麻酔
をすることがその疹痛を感じさせない方法であると考え
る。Since mechanical treatment is performed by cutting with a cutting tool, it is important to reduce the cutting force even slightly, eliminate dynamic fluctuations of the tooth during cutting, and reduce the factors that cause dynamic irritation to the nerves. can be considered as one method. The order of methods for reducing eruption pain is 1) fixation of the tooth, 2)
Reduction of cutting force, 3) utilization of anesthetic effect can be considered. In other words, we believe that reducing the cutting force during cutting, eliminating the dynamic behavior of the tooth, and, if unavoidable, using anesthesia injections or administering laughing gas anesthesia is a way to prevent the pain from being felt. .
しかし、薬物によるショックなどの理由で薬物による従
釆の麻酔が利用できない場合が最近非常に多くなってき
ている。また、麻酔を利用できたとしても回復には長時
間を必要としている。この麻酔を利用しないでも不快感
，苦痛，恐怖感や塔痛を感じさせずに治療することが理
想である。本発明は氷らく夢みてきたこの理想を実現さ
せることのできる画期的な新しい歯牙切削装置に関する
ものである。まず切削力を軽減させることを考える。However, there have recently been an increasing number of cases in which secondary anesthesia using drugs cannot be used due to reasons such as drug-induced shock. Furthermore, even if anesthesia is available, recovery takes a long time. Ideally, treatment should be performed without causing discomfort, pain, fear, or tower pain even without the use of anesthesia. The present invention relates to an epoch-making new tooth cutting device that can realize this long-awaited ideal. First, consider reducing the cutting force.
この切削力の軽減のためにとられてきた従釆の方法は、
切削工具の回転数の高速化による方法である。The traditional methods used to reduce this cutting force are:
This method involves increasing the rotational speed of the cutting tool.
すなわち、空気タービンによる３０万回転程度の高速切
削による方法である。この３０万回の回転数をさらに高
速化すれば今日における切削力よりもさらにその切削力
が軽減されることが考えられるが、今日の技術をもって
しては３０万回程度が限界のようである。第１図は、こ
の高速切削中の切削工具と歯牙との振動系をモデル化し
て示したものである。That is, this is a method of cutting at a high speed of about 300,000 rotations using an air turbine. If this 300,000 rotation speed were further increased, the cutting force could be reduced even more than today's cutting force, but with today's technology, around 300,000 rotations seems to be the limit. . FIG. 1 shows a model of the vibration system between the cutting tool and the tooth during high-speed cutting.
歯牙１は歯槽骨１３に対して、ばね２，３およびダッシ
ュポット４，５を介して固定されているとして考え、こ
の歯牙１を切削工具７を矢印８の方向に高速回転させて
切削する。神経６は歯牙１の振動に比例して加圧変形，
変位され、象牙質細管内歯液で支えられているトームス
繊維および象牙芽細胞と繊維芽細砲の変動を感受する神
経を含めて、これを支えるばね９，１０およびダッシュ
ポット１１，１２によって、その動的変位が決って、こ
れが塔痛となって感知されるものと考えられる。すなわ
ち、この疹痛伝達系と終端における疹痛判断機能を含め
た神経系にも周波数特性があるものとして考える。この
ように考えると歯牙切削時の歯牙１の動的挙動が少なけ
れば疹痛が軽減させることがわかる。高速回転させたと
きの切削力波形はＰ＋ｐｓｌｎ のｔで表わされる（Ｐ
は静的切削力、ｐは動的切削力、のは切削抵抗波形の角
速度）。The tooth 1 is assumed to be fixed to the alveolar bone 13 via the springs 2, 3 and the dashpots 4, 5, and the tooth 1 is cut by rotating the cutting tool 7 at high speed in the direction of the arrow 8. The nerve 6 is deformed under pressure in proportion to the vibration of the tooth 1.
Including the nerves that sense the fluctuations of TOMS fibers and odontoblasts and fibroblasts that are displaced and supported by the dental fluid in the dentin tubules, by supporting springs 9, 10 and dashpots 11, 12, It is thought that this dynamic displacement is what is perceived as a tower pain. In other words, it is assumed that the nervous system including the eruption pain transmission system and the eruption pain judgment function at the terminal end also has frequency characteristics. Considering this, it can be seen that the less dynamic behavior of the tooth 1 during tooth cutting, the less the eruption pain. The cutting force waveform when rotating at high speed is expressed as t of P+psln (P
is the static cutting force, p is the dynamic cutting force, and is the angular velocity of the cutting force waveform).
この波形を固有振動数ｆｎの歯牙１に作用させると、歯
牙１の固有振動数ｆｎは約３００〜２０００ＨＺ程度で
、３０方回転する切削工具７の切削力波形の振動数ｆ（
ｆ＝券）に比べると・極めて低・のでｆ／ｆｎ》１の条
件が満足され、切削力による歯牙１の変位Ｘは毒という
値となる（ｋは、ばね２，３のばね定数）。すなわち、
時間的な変動がなくなり、歯牙１が振れ動かなくなるの
で静的変位のみの神経の刺戟となって客痛をやわらげる
こととなる。さて、このとき、パルス切削力波形竿Ｐ＋
者Ｐ
ｔｃ
三ｉｎ 打でＯＳｎ のｔ
（Ｐ：パルス切削力、ｔｃ：パルス切削力作用時間、Ｔ
：パルス切削力が作用する周期）を作用させると、ｆ／
ｆｎ》１のとき、歯牙１の変位れま羊．毒となって雫欄
豚明ら仰臥湖。When this waveform is applied to the tooth 1 having a natural frequency fn, the natural frequency fn of the tooth 1 is approximately 300 to 2000 Hz, and the frequency f(
Since the condition of f/fn》1 is satisfied, the displacement X of the tooth 1 due to the cutting force is a poisonous value (k is the spring constant of the springs 2 and 3). That is,
Since there is no temporal fluctuation and the tooth 1 does not vibrate or move, the nerves are stimulated only by static displacement, which relieves the customer's pain. Now, at this time, the pulse cutting force waveform rod P+
(P: Pulse cutting force, tc: Pulse cutting force action time, T
: When the pulse cutting force is applied, f/
fn》1, the displacement of tooth 1. The lake becomes poisonous and the pigs are turned upside down.
地減少し脳拙い鍬轍砂議大きく なった効果がもたらされる。The land is decreasing and the brainless hoe, rut, and sand debate are getting louder. It brings about the same effect.
すなわち、歯牙１の変位刈ま切削工具７を高速回転のみ
させたときの数Ｘ宅批べて竿と小さくなる画期的効賊も
たらされ疹痛がより少くなる。That is, an epoch-making effect is brought about in which the displacement of the tooth 1 becomes smaller than that of a rod when the cutting tool 7 is rotated only at high speed, and the pain is reduced.
すなわち、工具を超音波振動させ、これを回転させて切
削する装置である。この切削工具を超音波振動させ、そ
の振動速度と切削速度との間に関係をもたせることによ
ってえられるパルス切削力波形に対して、歯牙１を超音
波振動させ切削工具は振動速度とは無関係に現在の技術
でなし得るかぎりの高速回転とさせ振動速度を送り速度
との間に関係をもたせ、送り速度を振動速度よりも遅く
することによってパルス切削力波形を発生させることが
でき、歯牙に作用する切削力を激減させることができる
。In other words, it is a device that vibrates a tool ultrasonically and rotates it for cutting. In response to the pulse cutting force waveform obtained by ultrasonically vibrating the cutting tool and creating a relationship between the vibration speed and the cutting speed, the tooth 1 is ultrasonically vibrated and the cutting tool is moved independently of the vibration speed. By making the rotation as high as possible with current technology, creating a relationship between the vibration speed and the feed rate, and making the feed rate slower than the vibration speed, it is possible to generate a pulsed cutting force waveform that acts on the tooth. The cutting force can be drastically reduced.
次に、ばね定数ｋを極大化することを考える。Next, consider maximizing the spring constant k.
それには、隣合っている歯牙を利用して固定してしまう
ブリッジ法が用いられる。これは従来から行なわれてい
る方法である。しかし、この切削工具を使用して歯牙を
切削治療する場合にいちいち、このブリッジ法を利用す
るのは大変面髄なため、実際には用いられておらず患者
に疾病を我慢することが強要されているのが現状である
。For this purpose, a bridge method is used, which uses adjacent teeth to secure the tooth in place. This is a conventional method. However, since it is very inconvenient to use this bridging method every time a tooth is treated by cutting a tooth using this cutting tool, it is not used in practice and patients are forced to put up with the disease. The current situation is that
そこで、歯牙の構造特性に注目して、その特性を利用し
て見掛け上、ばね定数ｋを極大化することを考える。Therefore, we will focus on the structural characteristics of teeth and consider how to utilize those characteristics to apparently maximize the spring constant k.
さて・し、まここ１こ、折馬〜：鋼機 動数、ｋ：‘まね定数、ｍ：質量）の関係がある。Well then, here is Makoto, Orima~: Kouki There is a relationship between the number of motions, k: imitation constant, and m: mass).
質量ｍが一定の歯牙を竜わし、、磁わし、振動子１４と
先端を絞って、切削することを目的とせずに加圧するこ
とを目的として丸味をもたせた形状として振幅拡大用ホ
ームを兼ねた接触子１５によって矢印１７の方向に軽く
加圧して矢印１６の方向に振動数Ｆ、振幅ａ、例えば５
０ｋＨＺ、振幅４仏ｍの微小振幅で超音波振動させると
歯牙はこの振動数、振幅に近い状態で振動し、この関係
式によってわかるようにｍが一定の歯牙の固有振動数の
ｎを見掛け上高くすることに相当してそのばね定数を見
掛け上高めることになる。歯牙１の固有振動数は３００
ＨＺ〜２０００ＨＺ程度である。いま、たとえば歯牙１
の固有振動数を５ｏｏＨＺとすると、聖砦。≦ｌｏｏす
なわち約１００の部まね定数を高めたことになる。実際
には、超音波振動する接触子を歯牙に押しあてて歯牙を
振動させるため接触子の振動数と同一振動数で歯牙が振
動するとは限らないが、接触子の振動数に近い振動数で
振動し、歯牙の見掛け上の固有振動数を高めたことにな
り見掛け上の歯牙のばね定数を歯牙本来のばね定数より
高める。振動方向は歯牙１が振動し易い方向に向って与
える。A tooth with a constant mass m is made, and the tip of the magnetic head and vibrator 14 is squeezed, and it has a rounded shape for the purpose of applying pressure without the purpose of cutting, and also serves as a home for amplitude expansion. Lightly pressurize in the direction of arrow 17 with contactor 15 and apply vibration in the direction of arrow 16 at frequency F and amplitude a, for example 5.
When ultrasonic vibration is applied at 0 kHz and a minute amplitude of 4 meters, the tooth will vibrate at a frequency close to this frequency and amplitude. This increases the spring constant apparently. The natural frequency of tooth 1 is 300
It is about Hz to 2000Hz. Now, for example, tooth 1
If the natural frequency of is 5ooHZ, it is a holy fortress. ≦loo, that is, the imitation constant of about 100 has been increased. In reality, an ultrasonic vibrating contact is pressed against the tooth to vibrate the tooth, so the tooth does not necessarily vibrate at the same frequency as the contact, but it vibrates at a frequency close to the contact. The tooth vibrates and increases the apparent natural frequency of the tooth, making the apparent spring constant of the tooth higher than the tooth's original spring constant. The direction of vibration is given in the direction in which the tooth 1 is likely to vibrate.
すなわち、ぐらぐらと大きく動き易い固有振動数の低い
歯牙１を数一ｍ程度の微少振幅の範囲で超音波振動エネ
ルギーを与えて振動させることによって歯牙１の本釆の
状態におけるばね定数を見掛け上大きくして数ｒｍ程度
の微少振幅の範囲にその変位をとどめられるようにばね
定数を高めることができる。このような超音波域の極め
て高い振動数における振幅３〜４Ａｍ程度の微少変位に
よる神経への刺戟は、塔痛伝達神経系と終端における疹
痛判断機能を含めた全神経系の低い周波数特性では追従
できず、神経系はまった〈感受し得ないのでこのための
疹痛は皆無となる。In other words, by applying ultrasonic vibration energy to vibrate the tooth 1, which has a low natural frequency and which tends to wobble greatly, in a range of minute amplitude of several tens of meters, the spring constant of the tooth 1 in its original state can be increased by an apparently large amount. The spring constant can be increased so that the displacement can be kept within a minute amplitude range of about several rms. Stimulation of the nerves by minute displacements with an amplitude of about 3 to 4 Am at extremely high frequencies in the ultrasonic range is due to the low frequency characteristics of the entire nervous system, including the tower pain transmitting nervous system and the pain judgment function at the terminal end. Unable to follow it, the nervous system becomes stuck and cannot sense it, so there is no pain at all.
この神経系の周波数特性を利用して歯牙を超音波振動さ
せて疹痛を感じさせないようにする方法を歯牙に対する
力学的麻酔法と名付ける。また、一方、歯牙のエナメル
質、象牙質のような脆性材料を超音波振動させると、そ
の振動にともなう応力ひずみが発生して見掛け上磯級的
性質が変位して切削抵抗が約１．５〜３倍程度下る現象
があることを発見した。The method of using this frequency characteristic of the nervous system to vibrate the tooth with ultrasonic waves so that the tooth does not feel pain is called mechanical anesthesia for the tooth. On the other hand, when brittle materials such as tooth enamel and dentin are subjected to ultrasonic vibration, stress and strain are generated due to the vibration, and the apparent rock-like properties are displaced, resulting in a cutting resistance of approximately 1.5~ I discovered that there is a phenomenon where the price drops by about 3 times.
したがって、歯牙１を超音波振動させて切削することは
、切削力そのものを軽減させることができる上、ばね定
数を激増させ、歯牙が大きな変位で変動することを防ぎ
、神経の刺戟を少くする効果に加えて、力学的麻酔効果
が加味されて歯牙切削時の疾病を皆無とする画期的効果
が得られることになる。Therefore, cutting the tooth 1 by ultrasonic vibration not only reduces the cutting force itself, but also dramatically increases the spring constant, which prevents the tooth from fluctuating due to large displacements and reduces nerve stimulation. In addition to this, the mechanical anesthetic effect is added, resulting in the revolutionary effect of completely eliminating diseases during tooth cutting.
すなわち、固有振動数の低い歯牙１を図のようにして超
音波振動させると、歯牙１はその振動数で超音波振動し
与えた超音波振動エネルギーによって見掛け上のばね定
数は激増し、この歯牙１を高速回転するダイヤモンドバ
ーで高速切削するとその切削力は激減し、歯牙の振動姿
態をさまたげなくなる。In other words, when the tooth 1 with a low natural frequency is subjected to ultrasonic vibration as shown in the figure, the tooth 1 vibrates ultrasonically at that frequency, and the apparent spring constant increases dramatically due to the applied ultrasonic vibration energy. When No. 1 is cut at high speed with a diamond bur rotating at high speed, the cutting force is drastically reduced, and the vibration state of the tooth is no longer disturbed.
したがって、歯牙は与えた超音波振動数と微少振動をも
って安定した超音波振動を持続し、この程度の微少振幅
は無視でき、歯牙は不動状態を維持して、神経を大きく
動揺させずに、これにさらに力学的麻酔効果が加味され
、歯牙切削時の疹痛を皆無とする画期的効果が得られる
。その上、患者は治療中顔をそむけることもないので治
療時における安全性が高められるなどの２次的効果も得
られる。次に本 明の実施例を第２図以下に示す。Therefore, the tooth maintains stable ultrasonic vibration at the given ultrasonic frequency and minute vibration, and this minute amplitude can be ignored, and the tooth maintains an immobile state and does this without greatly agitating the nerves. In addition, a mechanical anesthetic effect is added to achieve the revolutionary effect of completely eliminating pain during tooth cutting. In addition, secondary effects such as increased safety during treatment can also be obtained since the patient does not have to turn his or her face away during treatment. Next, an embodiment of the present invention is shown in FIG. 2 and below.
第２図は縦超音波振動子１４とこの振動子１４の振動数
で共振する長さをもった縦超音波振動ホーン接触子１５
とを利用する場合である。FIG. 2 shows a vertical ultrasonic vibrator 14 and a vertical ultrasonic vibrating horn contactor 15 having a length that resonates at the frequency of the vibrator 14.
This is the case when using
縦超音波振動子１４は露わいあるし・は磁わし・振動子
を用いる。その振動数は２０ｋ日２以上の超音波城の高
い振動数とする。このような高い振動数とすることによ
って本発明の歯牙振動装置を軽量・小型にすることがで
きる。ホーン接触子１５の材質は一般には金属棒を用い
るが場合によっては弾性変形し易い非金属棒を用いるこ
ともある。As the vertical ultrasonic transducer 14, an exposed or magnetic oscillator is used. The frequency is set to be a high frequency of ultrasonic waves of 20k days or more. By setting such a high frequency, the tooth vibrating device of the present invention can be made lightweight and compact. The horn contactor 15 is generally made of a metal rod, but in some cases a non-metal rod that is easily elastically deformed may be used.
その先端は、歯牙１と接触させて、これを切削すること
なく歯牙１を振動させることを目的とすことから、丸味
を設け、歯牙表面を傷つけないような形状とする。場合
によっては歯牙表面との接触状態を安定させるために面
接鮫させるような曲面形状とすることもある。この先端
接触子１５ｂは切削工具と異り摩耗しないので交換の必
要がなくホーン１５ａと一体で製作することができる。
用途によっては、直径の細いもの、太いものとを用意す
る必要があるときがあるので、このときは、先端接触子
１５ｂをホーン１５ａと別体しておいて、ねじあるいは
テーパ結合して使用する。振動装置の端子１９を超音波
発振機の出力端子に接続すると接触子１５ｂの先端は矢
印１６の方向に超音波振動する。The tip is rounded and shaped so as not to damage the tooth surface because the purpose is to bring it into contact with the tooth 1 and vibrate the tooth 1 without cutting it. In some cases, a curved surface shape may be used to stabilize the contact state with the tooth surface. This tip contact 15b does not wear out unlike a cutting tool, so there is no need to replace it and it can be manufactured integrally with the horn 15a.
Depending on the application, it may be necessary to prepare one with a smaller diameter or one with a larger diameter, so in this case, the tip contact 15b is separated from the horn 15a and used by screwing or tapering together. . When the terminal 19 of the vibrator is connected to the output terminal of the ultrasonic oscillator, the tip of the contact 15b vibrates ultrasonically in the direction of the arrow 16.
このホーン１５ａの振動節を利用してグリップ１８をも
うける。そして、このグリップを握ってホーン接触子１
５先端を歯牙１に対して矢印１７の方向に軽く加圧して
歯牙１を振動させ、これを矢印８の方向に高速回転する
ダイヤモンド砥石よりなる切削工具７を利用して切削す
る。歯牙１の前面に金属冠などがかぶされているときな
どでは金属冠を介しての振動駆動は十分でないので冠の
かぶっていない裏面へホーン接触子１５を接触させる必
要が生ずる。A grip 18 is provided by utilizing the vibration nodes of the horn 15a. Then, hold this grip and press horn contact 1.
5 is lightly pressed against the tooth 1 in the direction of arrow 17 to vibrate the tooth 1, and is cut using a cutting tool 7 made of a diamond grindstone rotating at high speed in the direction of arrow 8. When the front surface of the tooth 1 is covered with a metal crown or the like, the vibration drive through the metal crown is not sufficient, so it becomes necessary to bring the horn contactor 15 into contact with the back surface that is not covered with the crown.
第３図はこのような場合のために考案した装置である。FIG. 3 shows a device devised for such a case.
すなわち、縦超音波振動子１４とこの振動子１４の振動
数で共振する長さをもった縦振動ホーン２０の先端に、
その振動数で曲げ共振する形状の接触子２１をその振動
復において取付けた形状による歯牙振動装置である。接
触子２１の先端の振動復の位置に第２図のホーン接触子
１５の先端形状と同様に丸味をつけた突起部を設ける。That is, at the tip of the vertical ultrasonic vibrator 14 and the longitudinal vibrating horn 20 having a length that resonates at the frequency of the vibrator 14,
This is a tooth vibrating device having a shape in which a contactor 21 having a shape that bends and resonates at that frequency is attached at the vibration resonator. A rounded protrusion similar to the shape of the tip of the horn contactor 15 shown in FIG. 2 is provided at the vibration recovery position of the tip of the contactor 21.
この突起部は矢印１６の方向に超音波振動する。これを
矢印１７の方向に加圧して歯牙１を振動させ、該歯牙１
を高速回転する切削工具７によって切削する。第４図は
縦振動子１４と馨曲した振幅拡大用ホーン接舷子２２と
よりなる歯牙振動装置である。This protrusion vibrates ultrasonically in the direction of arrow 16. This is pressurized in the direction of the arrow 17 to vibrate the tooth 1.
is cut by a cutting tool 7 that rotates at high speed. FIG. 4 shows a tooth vibrating device consisting of a vertical vibrator 14 and a curved horn abutment 22 for increasing amplitude.
この装置によって矢印１６の方向に接触子２２の先端が
振動する。これを歯牙１に対して矢印１７の方向に軽く
加圧して歯牙１を振動させ、該歯牙１を高速回転する切
削工具７によって切削する。第５図はねじり振動子２６
とこの振動子２６の振動数で共振する長さをもつたねじ
り超音波振動ホーン２３とねじり振動接触子あるいは曲
げ振動接触子２５とよりなる歯牙振動装置である。振動
装置の端子２８を超音波発振機の出力端子に接続すると
ホーン２３の先端は矢印２４の方向にねじり振動する。
このホーン２３の振動節を利用してグリップ２７をもう
ける。ホーン２３の先端にねじりあるいは曲げ振動接触
子２５を、その振動節を利用して取付ける。このように
して接触子２５の先端を矢印１６の方向に超音波振動さ
せることができる。グリップ２７を握って該接触子２５
の先端を歯牙１に対して矢印１７の方向に軽く加圧して
歯牙１を振動させ、該歯牙１を切削工具７によって切削
する。切削抵抗の軽減効果を確認するために、象牙およ
び抜歯した歯牙を２８ｋＨＺの振動数で超音波振動する
ホーンの先端に接着剤を用いて接着し、ホ−ン先端の振
幅８ムｍ、振動数２８ｋＨＺで象牙および歯牙を超音波
振動させ、これをダイヤモンドバイトあるいはダイヤモ
ンド砥石を用いて定荷重方式で切削してその切削量を比
較してみた。This device causes the tip of the contactor 22 to vibrate in the direction of arrow 16. This is lightly pressed against the tooth 1 in the direction of the arrow 17 to vibrate the tooth 1, and the tooth 1 is cut by a cutting tool 7 rotating at high speed. Figure 5 shows the torsional oscillator 26.
This tooth vibrating device includes a torsional ultrasonic vibrating horn 23 having a length that resonates at the frequency of the vibrator 26, and a torsional vibrating contactor or a bending vibrating contactor 25. When the terminal 28 of the vibrator is connected to the output terminal of the ultrasonic oscillator, the tip of the horn 23 torsionally vibrates in the direction of the arrow 24.
A grip 27 is provided by utilizing the vibration nodes of the horn 23. A torsion or bending vibration contact 25 is attached to the tip of the horn 23 using its vibration node. In this way, the tip of the contactor 25 can be ultrasonically vibrated in the direction of the arrow 16. Grip the grip 27 and touch the contact 25.
The tip of the tooth 1 is lightly pressed in the direction of the arrow 17 to vibrate the tooth 1, and the tooth 1 is cut by the cutting tool 7. In order to confirm the effect of reducing cutting resistance, ivory and extracted teeth were glued to the tip of a horn that vibrates ultrasonically at a frequency of 28 kHz, and the amplitude of the horn tip was 8 mm and the frequency was Ivory and teeth were subjected to ultrasonic vibration at 28kHz, and then cut using a constant load method using a diamond bit or a diamond grindstone, and the amount of cutting was compared.
その結果一定時間内の切削量が象牙あるいは歯牙を超音
波振動させない従来の方法のときの切削量の約２〜６倍
多いことがわかった。このように象牙や歯牙に対して一
定荷重で加圧して切削したときの切削量が多いことはそ
れだけ切削力が小さいことを意味するものであるから、
この方法は象牙や歯牙に対して切削力を軽減させる新し
い技術の１つであることがわかる。そして、従来のエア
ータービンでの高速回転のみによるときは、工具の切れ
味がわずかでも低下すると、患者は不快感，疹楠を感じ
るので、その時点を工具寿命として、工具を交換せざる
を得ないという極めて工具寿命が短い状態であったが、
本発明によると工具寿命は３〜１ぴ部こも延びる効果が
得られ、さらに、切削力波形がパルス状であるように、
歯牙切削時に発生する切削熱の波形もパルス状波形とな
り、力学系での周波数特性と同様に熱伝達系でも周波数
特性が現われて、切削熱による疹痛も激減され、又麻酔
をして切削しなければならない状態の歯牙に対しても、
麻酔を省略することができ、薬物によるショックなどの
理由でこの麻酔が利用できない場合などのときでも、疹
痛や不快感，恐怖感を与えずに切削することができると
いう従来の歯牙切削に対する理論と技術ではなしえなか
った、画期的効果を有するものである。As a result, it was found that the amount of cutting within a certain period of time was approximately 2 to 6 times greater than the amount of cutting that was achieved using the conventional method that does not use ultrasonic vibrations on the ivory or tooth. In this way, when ivory or teeth are cut under constant pressure, the amount of cutting is large, which means that the cutting force is small.
It can be seen that this method is one of the new techniques for reducing the cutting force on ivory and teeth. When using only high-speed rotation with conventional air turbines, if the sharpness of the tool deteriorates even slightly, the patient feels discomfort and irritation, so the tool has no choice but to be replaced at that point, which ends the tool's lifespan. However, the tool life was extremely short.
According to the present invention, the tool life can be extended by 3 to 1 parts, and furthermore, the cutting force waveform is pulse-shaped.
The waveform of the cutting heat generated during tooth cutting also becomes a pulse-like waveform, and similar to the frequency characteristic in the mechanical system, a frequency characteristic appears in the heat transfer system, and the pain caused by the cutting heat is drastically reduced. Even for teeth that are in a state of need,
The theory behind conventional tooth milling is that anesthesia can be omitted, and even when anesthesia is unavailable due to drug-induced shock, tooth milling can be performed without causing pain, discomfort, or fear. It has an epoch-making effect that could not be achieved with technology.
第１図は歯牙と切削工具との振動系をモデル化して示し
た正断面図、第２図乃至第４図は本発明の第１乃至第３
実施例の正断面図である。
第５図は本発明の第４実施例を示し、Ａは正断面図、Ｂ
は平面図である。１・・・歯牙、７・・・切削工具、１
４・・・縦超音波振動子、１５・・・ホーン振動子、１
５ａ，２０，２３．．・ホーン、１５ｂ，２１，２２，
２５・・・接触子。
第２図第４図
第１図
第３図
第５図FIG. 1 is a front cross-sectional view modeling the vibration system of teeth and cutting tools, and FIGS.
It is a front sectional view of an example. FIG. 5 shows a fourth embodiment of the present invention, where A is a front sectional view and B is a front sectional view.
is a plan view. 1... Tooth, 7... Cutting tool, 1
4... Vertical ultrasonic transducer, 15... Horn transducer, 1
5a, 20, 23. ．．・Horn, 15b, 21, 22,
25... Contact. Figure 2 Figure 4 Figure 1 Figure 3 Figure 5
Claims (1)
を先端に有する超音波振動装置と高速回転の先端チツプ
を有する切削工具とからなる歯牙切削装置。1. A tooth cutting device consisting of an ultrasonic vibrator having a member at its tip that transmits ultrasonic vibrations to the tooth to be cut, and a cutting tool having a high-speed rotating tip.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132515A JPS6027298B2 (en) | 1981-08-24 | 1981-08-24 | tooth cutting device |
| KR8202444A KR860000378B1 (en) | 1981-08-24 | 1982-06-01 | Vibratory dental cutting system |
| US06/383,622 US4496321A (en) | 1981-08-24 | 1982-06-01 | Vibration method for cutting teeth |
| SE8204509A SE449296B (en) | 1981-08-24 | 1982-07-29 | DEVICE FOR VIBRATION PROCESSING OF TENDERS |
| AU86736/82A AU8673682A (en) | 1981-08-24 | 1982-08-04 | Vibration cutting apparatus for teeth |
| CA000409206A CA1204954A (en) | 1981-08-24 | 1982-08-11 | Vibration cutting apparatus for teeth |
| GB08223678A GB2104389B (en) | 1981-08-24 | 1982-08-17 | Vibrational dental cutting apparatus for a tooth |
| FR8214427A FR2511595A1 (en) | 1981-08-24 | 1982-08-20 | VIBRATORY TOOTH CUTTING APPARATUS |
| DE19823231307 DE3231307A1 (en) | 1981-08-24 | 1982-08-23 | DEVICE FOR DETECTING MATERIAL WITH VIBRATION |
| CH5037/82A CH659182A5 (en) | 1981-08-24 | 1982-08-24 | ARRANGEMENT FOR REMOVING DENTAL MATERIAL BY VIBRATION. |
| FI822932A FI72263C (en) | 1981-08-24 | 1982-08-24 | VIBRATIONSSKAERANORDNING FOER TANDSKOETSEL. |
| AU40172/85A AU574144B2 (en) | 1981-08-24 | 1985-03-20 | Using vibrator for painless tooth cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56132515A JPS6027298B2 (en) | 1981-08-24 | 1981-08-24 | tooth cutting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5836540A JPS5836540A (en) | 1983-03-03 |
| JPS6027298B2 true JPS6027298B2 (en) | 1985-06-28 |
Family
ID=15083131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56132515A Expired JPS6027298B2 (en) | 1981-08-24 | 1981-08-24 | tooth cutting device |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4496321A (en) |
| JP (1) | JPS6027298B2 (en) |
| KR (1) | KR860000378B1 (en) |
| AU (2) | AU8673682A (en) |
| CA (1) | CA1204954A (en) |
| CH (1) | CH659182A5 (en) |
| DE (1) | DE3231307A1 (en) |
| FI (1) | FI72263C (en) |
| FR (1) | FR2511595A1 (en) |
| GB (1) | GB2104389B (en) |
| SE (1) | SE449296B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215353A (en) * | 1984-04-11 | 1985-10-28 | 隈部 まさる | Tooth canal treating apparatus |
| EP0277823B1 (en) * | 1987-02-04 | 1991-04-24 | Taga Electric Co. Ltd. | Ultrasonic vibration cutting device |
| JP2797260B2 (en) * | 1991-04-17 | 1998-09-17 | スズキ株式会社 | Ultrasonic cutter |
| JPH07100753A (en) * | 1993-09-30 | 1995-04-18 | Taga Electric Co Ltd | Rotary working device, rotary tool therefor and device body therefor |
| DE4447667C2 (en) * | 1994-02-27 | 2002-10-24 | Rainer Hahn | Ultrasonic handpiece |
| US5437606A (en) * | 1994-03-28 | 1995-08-01 | Tsukamoto; Kenichi | Ultrasonic system to alleviate toothaches |
| CA2243945A1 (en) * | 1995-12-07 | 1997-06-12 | Tim Pham | Apparatus and method of reducing the pain of a subcutaneous injection |
| US6106289A (en) * | 1998-11-06 | 2000-08-22 | Rainey; J Tim | Sonic delivery system for dentistry using a terfnol driver |
| EP1115338B1 (en) * | 1999-05-07 | 2006-08-16 | Aesculap AG & Co. KG | Rotating surgical instrument |
| JP3553486B2 (en) * | 2000-11-10 | 2004-08-11 | 隈部 まさる | Mechanical anesthesia and affected area separation device |
| DE102007041014A1 (en) * | 2007-08-29 | 2009-03-05 | Sirona Dental Systems Gmbh | Drive for a dental handpiece and method for applying a vibration to a drive |
| DE102007041016B4 (en) * | 2007-08-29 | 2013-04-18 | Sirona Dental Systems Gmbh | Motor, dental handpiece and method for damping the engine vibrations |
| FR2930423B1 (en) * | 2008-04-25 | 2010-05-07 | Gerard Scortecci | DEVICE FOR BONE REGENERATION |
| JP6709163B2 (en) * | 2014-10-08 | 2020-06-10 | シチズン時計株式会社 | Machine tool and control device for this machine tool |
| US10744567B2 (en) * | 2015-09-10 | 2020-08-18 | Citizen Watch Co., Ltd. | Control device for machine tool and machine tool |
| CN108025412B (en) * | 2015-09-24 | 2020-03-06 | 西铁城时计株式会社 | Control device for machine tool and machine tool provided with same |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE758727C (en) * | 1940-03-02 | 1951-05-15 | Maximilian Kramer | Dental instrument |
| US2947082A (en) * | 1953-05-15 | 1960-08-02 | Epstein Herman | Crystal driven dental tool |
| NL106732C (en) * | 1955-03-08 | |||
| US3133351A (en) * | 1957-02-11 | 1964-05-19 | Soundrive Engine Company | Method and apparatus for sonic dental drilling |
| US3058218A (en) * | 1959-05-07 | 1962-10-16 | Cavitron Ultrasonics Inc | Methods and means for driving small diameter shafts at high rotational speeds |
| US3094115A (en) * | 1960-06-08 | 1963-06-18 | Herbert S Polin | Tooth mobility indicator |
| US3083463A (en) * | 1961-04-13 | 1963-04-02 | Brooks Bernard | Dental drilling and apparatus therefor |
| US3332149A (en) * | 1963-02-27 | 1967-07-25 | Everett D Mumaw | Instrument for loosening teeth with high-frequency vibrations |
| US3400459A (en) * | 1964-07-13 | 1968-09-10 | Ritter Pfaudler Corp | Dental handpiece |
| US3589012A (en) * | 1969-06-30 | 1971-06-29 | C & B Corp | Tip for ultrasonic dental instrument |
| US3651576A (en) * | 1970-05-18 | 1972-03-28 | Dynamics Corp America | Electroacoustic massager for the gums |
| US3924335A (en) * | 1971-02-26 | 1975-12-09 | Ultrasonic Systems | Ultrasonic dental and other instrument means and methods |
| US3930173A (en) * | 1971-06-15 | 1975-12-30 | Surgical Design Corp | Ultrasonic transducers |
| US4110908A (en) * | 1976-06-03 | 1978-09-05 | Litton Industrial Products, Inc. | Ultrasonic dental scaler |
| US4229168A (en) * | 1978-08-23 | 1980-10-21 | Scholz Jr Howard W | Contra-angle ultrasonic endodontic instrument |
| US4219619A (en) * | 1978-09-08 | 1980-08-26 | Zarow Merle C | Vibrating dental instrument for setting crowns |
-
1981
- 1981-08-24 JP JP56132515A patent/JPS6027298B2/en not_active Expired
-
1982
- 1982-06-01 KR KR8202444A patent/KR860000378B1/en active
- 1982-06-01 US US06/383,622 patent/US4496321A/en not_active Expired - Lifetime
- 1982-07-29 SE SE8204509A patent/SE449296B/en not_active IP Right Cessation
- 1982-08-04 AU AU86736/82A patent/AU8673682A/en not_active Abandoned
- 1982-08-11 CA CA000409206A patent/CA1204954A/en not_active Expired
- 1982-08-17 GB GB08223678A patent/GB2104389B/en not_active Expired
- 1982-08-20 FR FR8214427A patent/FR2511595A1/en active Granted
- 1982-08-23 DE DE19823231307 patent/DE3231307A1/en active Granted
- 1982-08-24 FI FI822932A patent/FI72263C/en not_active IP Right Cessation
- 1982-08-24 CH CH5037/82A patent/CH659182A5/en not_active IP Right Cessation
-
1985
- 1985-03-20 AU AU40172/85A patent/AU574144B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| GB2104389B (en) | 1985-06-26 |
| KR840000220A (en) | 1984-02-18 |
| SE8204509L (en) | 1983-02-25 |
| AU574144B2 (en) | 1988-06-30 |
| CA1204954A (en) | 1986-05-27 |
| FI822932A0 (en) | 1982-08-24 |
| GB2104389A (en) | 1983-03-09 |
| AU8673682A (en) | 1983-03-03 |
| FI822932L (en) | 1983-02-25 |
| FR2511595B1 (en) | 1985-03-08 |
| FR2511595A1 (en) | 1983-02-25 |
| FI72263C (en) | 1987-05-11 |
| AU4017285A (en) | 1985-09-19 |
| KR860000378B1 (en) | 1986-04-16 |
| CH659182A5 (en) | 1987-01-15 |
| SE8204509D0 (en) | 1982-07-29 |
| JPS5836540A (en) | 1983-03-03 |
| US4496321A (en) | 1985-01-29 |
| SE449296B (en) | 1987-04-27 |
| DE3231307A1 (en) | 1983-03-10 |
| DE3231307C2 (en) | 1988-04-21 |
| FI72263B (en) | 1987-01-30 |
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